QLabel's linkHovered signal is not re-emitted if mouse movement exits and re-enters the over the linked text.

 
#include <QtGui>

class Echo : public QObject
{
    Q_OBJECT
public:
    Echo(QObject *parent = 0) : QObject(parent) {}
public slots:
    void echo(const QString &text)
    {
        qDebug() << text;
    }
};

int main(int argc, char **argv)
{
    QApplication app(argc, argv);

    QWidget w;
    QVBoxLayout *layout = new QVBoxLayout(&w);

    QLabel *label = new QLabel("<a href='test'>This is a link</a>");
    layout->addWidget(label);

    QObject::connect(label, SIGNAL(linkHovered(QString)),
                     new Echo(label), SLOT(echo(QString)));

    w.show();

    return app.exec();
}